JPH05111516A - Revolving chair moving device for sitting position radiation surgical treatment system - Google Patents

Abstract

PURPOSE:To dispense with a dedicated moving bogie of a revolving chair by providing floating mobile casters protrudable from openings of a revolving chair grounding base having multiple openings. CONSTITUTION:When the drive switch of mobile cylinders 118 is turned on to increase the pressure of the cylinders 118, the pistons 154 of the mobile cylinders 118 are extended in the length direction, and L-shaped arms 151 are rotated clockwise or counterclockwise centering on fulcrums 153. The L-shaped arms 151 are rotated downward, rollers 119 fitted to the L-shaped arms 151 are protruded from the openings 112 of a revolving chair grounding base 111, and a revolving chair is made movable. When the drive switch is turned in the direction to decrease the pressure of the mobile cylinders 118, the L-shaped arms 151 are rotated in the opposite direction, and the rollers 119 are stored in the openings 112. The revolving chair is made immovable by its weight and the friction of a bottom section. The movement and fixing of the revolving chair are facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating chair moving device in a sitting position irradiation surgical treatment system using an electron beam linear acceleration irradiation device which enables a patient to perform radiation irradiation surgical treatment in a comfortable sitting position. In recent years, for example, tumors,
Alternatively, an affected area such as an arteriovenous malformation (hereinafter, the affected area to be treated by radiation is simply referred to as an affected area) is not treated by surgery, but ionizing radiation such as x-rays or γ-rays (hereinafter, referred to as the present specification). According to the book, all ionizing radiation used for treatment is simply referred to as radiation), and treatment for chemically altering the tissue of the affected area has been advanced.

[0002]

2. Description of the Related Art For example, a brain tumor is treated by locating a tumor position by CT scanning and irradiating the affected area with radiation while the patient is laid on a bed. Since radiation also destroys cellular tissues other than the affected area, the electron linear acceleration irradiation device reciprocates in a fan shape in a vertical plane to reduce the influence of the irradiation dose on cells other than the affected area. Then, the radiation from the electron beam linear acceleration irradiation device is irradiated to the affected area of the patient for 1 to 2 minutes every day, and this treatment is repeated for several weeks to chemically modify the cellular tissue of the affected area. If the center position of the affected area does not coincide with the center of rotation of the linear acceleration irradiation device, the radiation irradiation area becomes inaccurate, and normal tissues other than the affected area may be damaged. Therefore, CT
Even a slight deviation is not allowed between the position of the affected area when scanned by and the irradiation position of the radiation aimed by the electron beam linear acceleration irradiation device. Therefore, the applicant of the present invention, instead of rotating the bed on which the patient sleeps, rotates the chair on which the patient sits (see, for example, Japanese Patent Application No. 1-210059).
Proposed.

FIG. 4 is an explanatory view of a state in which an electron beam linear acceleration irradiation device is used to irradiate the affected area of a patient with radiation to perform sitting treatment. In FIG. 4, the patient 41 is shown sitting on the swivel chair 42 and receiving the irradiation of the radiation beam 44 from the electron beam linear acceleration irradiation device 43 toward the center of the affected area 45. The irradiation field at the irradiation center of the radiation beam 44 at this time can be set to an arbitrary size, for example, having a diameter of 3 mm or more. By changing the angle of the backrest 46 and adjusting the fixing portion 47 of the head fixing device, the stereotaxic ring 48 is attached to the swivel chair 42 at a predetermined position. The adjustment of the attachment is performed by rotating the swivel chair 42 at a constant angular velocity about a vertical axis passing through the center position of the affected part 45.
Adjust to rotate. The rotation angular velocity of the swivel chair 42 is, for example, about 1/2 rotation per second, but can be any rotation speed. In this case, the swivel chair 42
The patient 41 sitting on the table rotates at an equal angular velocity, and therefore does not turn his eyes. Further, the rotation center of the electron beam linear acceleration irradiation device 43 is adjusted so as to rotate about the center of the affected area 45 within a vertical plane passing through the center position of the affected area 45. Furthermore, the radiation beam 4 can be stored without fatigue of the patient 41 for a long time.
A jaw fixing device 49 and the like that enables irradiation of 4 are provided.

As shown in FIG. 4, the irradiation angle of the radiation beam 44 of the electron beam linear accelerating irradiation device 43 is, for example, −45 ° in FIG. 4 when the horizontal front of the affected area 45 is 0 °. The patient 41 is rotated back and forth up to a position of 225 degrees behind the patient 41. Further, since the swivel chair 42 rotates at a constant angular velocity, the radiation beam 44 irradiates the affected area 45 with a much larger amount than the other normal cell tissues. Then, by controlling the rotation speed of the electron beam linear acceleration irradiation device 43, the radiation beam 44 irradiated to the center of the affected area 45 can be made to have a required constant amount.

Since the electron beam linear acceleration irradiation apparatus used for the above treatment is very expensive, it cannot be exclusively used for a sitting irradiation surgical treatment system. In addition, most of the treatments using the electron beam linear acceleration irradiation apparatus which are currently popular are performed on a bed. Therefore,
The swivel chair for the sitting irradiation surgical treatment system must be movable. 5 (a) and 5 (b) are a top view and a side view for explaining a dedicated moving carriage for moving the swivel chair for a sitting irradiation surgical treatment system. In FIG.
The dedicated carriage for the swivel chair for the sitting irradiation surgical treatment system includes a U-shaped horizontal support 521 and a gear box 52.
Auxiliary support 524 on which 2, 522'527 are mounted, a hand push fork 529 having a drive unit such as a handle, and a suspension support rod 548 provided at a lower part of the horizontal support 521 in a vertically movable state. 549, and a drive mechanism for transmitting the rotation of the handle 537 by a shaft and a gear to vertically move the suspension supporting rods 548, 549. The suspension support rods 548, 549 are detachable from suspension support holes (not shown) provided in the base of the rotary chair for the electron beam linear acceleration irradiation device. The dedicated carriage of the rotary chair for the electron beam linear acceleration irradiation apparatus is transported to the vicinity of the rotary chair, and the suspension support rod 548 of the dedicated carriage is moved so as to be inserted into the suspension support hole of the rotary chair. After that, the drive unit of the exclusive moving carriage, for example, the handle 537 is rotated. The rotation of the handle 537 is transmitted to the first worm gear box 523 via the drive shaft 530. The rotation of the primary shaft 534, which is the output shaft of the first worm gear box 523, is caused by rotation of the bevel gear boxes 525, 5
26 is transmitted to a bevel gear (not shown). The rotation output of the bevel gear is transmitted through the secondary shaft 535 to the second and third worm gear boxes 522,
It is transmitted to a worm gear 522 '(not shown). Therefore, when the drive shaft of the dedicated carriage starts rotating due to the rotation of the handle 537, the first to third worm gears start rotating in the same direction and at the same speed. The three suspension support rods 548, 549 connected to the worm gear simultaneously rise to lift the swivel chair for the sitting irradiation surgical treatment system in a completely horizontal position. In this state, the dedicated cart can move the swivel chair to a desired place. Then, by performing the reverse operation to the above, the swivel chair is lowered to a predetermined place.

[0006]

The above-mentioned dedicated carriage for the rotary chair for the sitting irradiation surgical treatment system is not necessarily moved by a man. For example, they are often weak women such as nurses. In addition, a patient who has difficulty walking may perform a CT scan while sitting on a swivel chair, and then be moved to a place where an electron beam linear acceleration irradiation device is located. The sitting chair for a sitting irradiation surgical treatment system is a precision instrument capable of aligning the rotation center of the electron beam linear acceleration irradiation device and the rotation center of the rotation chair with the center of the affected area. Therefore, the swivel chair has to be carried in a horizontal state, and a dedicated moving carriage that can be carried while the patient's weight is added to the weight of the swivel chair is required. However, it is difficult for a conventional dedicated mobile trolley to be operated by a woman because the heavy rotating chair has to be moved up and down by the handle. Further, the dedicated carriage has a problem that it must be taken out of the warehouse every time the swivel chair is transported, and must be housed in the warehouse after moving the swivel chair. Therefore, the dedicated mobile dolly requires time and labor for placing or lowering the swivel chair, time and effort for putting it out of the warehouse or storing it in the warehouse, and a space such as a warehouse for storing it when not in use.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a rotating chair moving device in a sitting irradiation surgical treatment system which does not require a dedicated moving carriage. Another object of the present invention is to provide a moving device for a rotating chair in a sitting irradiation surgical treatment system capable of easily switching between moving the rotating chair and fixing it to the floor.

[0008]

In order to achieve the above object, a rotating chair moving device in a sitting irradiation surgical treatment system according to the present invention is provided with a rotating center of an electron beam linear acceleration irradiation device for irradiating radiation and a rotating chair. A first equipped with a caster capable of retracting from a lower base of a swivel chair having a rotation center and a mechanism for aligning an affected part of a patient with a center of the swivel chair
The invention and the second invention and the third invention in which the moving device is housed inside the frustoconical swivel chair.

(First and Second Inventions) A moving device for a swivel chair according to the first invention is an electron beam linear acceleration irradiation device for irradiating radiation while rotating in a vertical plane centering on an affected part,
In a sitting irradiation surgical treatment system consisting of a rotating chair rotating in a horizontal plane centered on a vertical axis passing through the center of the affected part, the rotation center of the electron beam linear acceleration irradiation device and the rotation center of the rotating chair are made to coincide with each other. First and second sliding mechanisms (114, 115, 116, 12 in FIG. 1) that can be moved in the X-axis direction and the Y-axis direction to adjust so that
0, 132, 117, 137, and 130, 134,
135, 136, 124, 133, 123), and third to fifth movable in X-axis direction, Y-axis direction, and Z-axis direction in order to align the rotation center of the electron beam linear acceleration irradiation device with the center of the affected area. Sliding mechanism (223, 224, 2 in FIG. 2)
25, 226, 232, 227, and 235, 23
6, 237, 242, 233, 234) having the first and second sliding mechanisms attached thereto and having a plurality of openings (112 in FIG. 1). A base (111 in FIG. 1), an L-shaped arm (151 in FIG. 1) whose one end is rotatably supported on the rotating chair grounding base (111), and one end is in the L-shaped arm (151). ), A linear drive mechanism (118 in FIG. 1) rotatably rotatably supporting the other end on the swivel chair grounding base (111), and the L-shaped arm (15).
1) A floating type caster (113 in FIG. 1) attached to the lower end of the swivel chair and capable of projecting and retracting through the opening (112) of the rotating chair grounding base (111).

(Third Invention) The float-type moving caster (113) of the third invention is constructed so as to be attached to and retracted from the lower part of a rotary chair having a truncated cone shape.

[0011]

[Work]

(1st invention and 2nd invention) An electron beam linear acceleration irradiation device irradiates radiation while rotating in a vertical plane centered on the affected part. The swivel chair in the sitting irradiation surgical treatment system rotates in a horizontal plane centered on a vertical axis passing through the center of the affected area. The rotating chair has X-axis and Y-axis direction sliding mechanisms for adjusting the rotation center and the rotation center of the electron beam linear acceleration irradiation device, and the electron beam linear acceleration irradiation device. It has an X-axis direction, a Y-axis direction, and a Z-axis direction sliding mechanism for adjusting the center of rotation and the center of the affected part to coincide with each other.
The sliding base of the swivel chair and the like are attached to the grounding base for the swivel chair, and an opening is formed.
Further, one end of the L-shaped arm and the other end of the linear drive mechanism are rotatably supported by the grounding base for the swivel chair.
Further, the other end of the L-shaped arm and one end of the linear drive mechanism are rotatably supported. Furthermore, a floating type caster for moving which can be retracted from the opening of the grounding base for the swivel chair by the linear drive mechanism is attached to the lower end of the L-shaped arm. When the linear drive mechanism is driven in a direction that extends the length, the L-shaped arm rotates about the grounding base for the swivel chair as a fulcrum, and the floating caster attached to the lower end of the L-shaped arm is opened. Make it protrude to the bottom. By pushing the swivel chair in such a state, it is possible to move to a desired place. When the swivel chair is moved in the direction of shortening the length of the linear drive mechanism after moving the swivel chair to the vicinity of the electron beam linear acceleration irradiation device, for example, the L-shaped arm uses the grounding base for the swivel chair as a fulcrum. By rotating in the opposite direction, the floating transfer caster is housed inside from the opening. And the swivel chair,
The bottom surface of the grounding base for a swivel chair and the top surface of the floor are closely attached and fixed. As described above, by simply expanding and contracting the linear drive mechanism, the floating transfer caster can appear and disappear from the opening of the grounding base for the swivel chair, so not only can the swivel chair be easily moved and fixed, but also a dedicated moving carriage. Is no longer needed.

(Third Invention) The levitation-type moving caster of the third invention is attached to a grounding base for a rotating chair, and
Since it can be retracted from the frusto-conical swivel chair, there is no protrusion on the outside, and safe rotation can be performed. In addition, the frusto-conical swivel chair not only has a good-looking appearance, but the grounding base part for the swivel chair with the largest diameter acts as a guard even when the swivel chair is moving, so the swivel chair Protects the internal sliding mechanism and parts above the seat from direct contact with the building or other equipment.

[0013]

[Examples] FIG. 1 is a diagram for explaining a rotary drive unit that is a lower portion of a swivel chair. FIG. 2 is a diagram for explaining an adjusting unit that is an upper part of the swivel chair. FIG. 3 is a diagram for explaining the outer appearance of the swivel chair in which the adjustment unit is placed on the rotation drive unit. First, the rotation drive unit 100 will be described with reference to FIG. The rotary drive unit 100 includes a rotary chair grounding base 111, an X-axis-Y-axis movable flange 121, and an X-axis-Y-axis movable flange 121.
It is composed of a shaft table 131.

The grounding base 111 for the swivel chair has openings 112 formed at four positions, for example. Further, on the grounding base 111 for the swivel chair, four levitation type moving casters 113, an X-axis direction adjusting motor 114, bearings 115 and 116, and a pair of X-axis direction rails 117 (in FIG. 1, Only one rail is visible) and is fixed. In the floating caster 113, for example, the roller 119 is projected from the opening 112 to the outside of the rotating chair ground base 111 by the piston 154 of the linear drive mechanism such as the movable cylinder 118,
Alternatively, it can be stored. That is, when the roller 119 of the floating type caster 113 is made to project from the opening 112 of the grounding base 111 for the swivel chair by the piston 154 of the movable cylinder 118, the rotation drive unit 1
00 is movable, and when the roller 119 is stored, it is fixed and cannot be moved.

The drive mechanism of the floating transfer caster 113 has an L-shaped arm 151 whose one end is rotatably supported by a fulcrum 152 on the rotating chair ground base 111.
And one end of the L-shaped arm 151 and the other end of the L-shaped arm 151. The other end of the L-shaped arm 151 is a movable cylinder 118 rotatably supported by a fulcrum 153 on the swivel chair grounding base 111. It The floating transfer caster 113 is attached to the lower end of the L-shaped arm 151, and the opening 11 of the grounding base 111 for the swivel chair.
The roller 119 that can appear and disappear from the 2 and the roller 11
And a mechanism for making 9 rotatable. The power for driving the movable cylinder 118 may be either hydraulic pressure or pneumatic pressure. Or movable cylinder 1
Instead of 18, a linear drive mechanism such as a linear motor can be used.

When it is desired to move the swivel chair, for example, by turning on a drive switch (not shown) of the movable cylinder 118 to increase the pressure of the cylinder, the piston 154 of the movable cylinder 118 extends in the longitudinal direction. The extension of the piston 154 of the movable cylinder 118 causes the L-shaped arm 151 to rotate clockwise or counterclockwise about the fulcrum 153. Therefore, the L-shaped arm 151 rotates downward, and the roller 119 attached to the L-shaped arm 151 projects from the opening 112 of the grounding base 111 for the swivel chair. Then, the swivel chair can be moved by the roller 119 protruding from the opening 112 of the grounding base 111 for swivel chair. On the contrary, when it is desired to install the swivel chair, the drive switch (not shown) is turned on in the direction of decreasing the pressure of the movable cylinder 118. The L-shaped arm 151 rotates in the opposite direction to the above, and the roller 119 attached to the L-shaped arm 151 causes the opening 1 of the grounding base 111 for the swivel chair.
It is housed inside 12. Thus, the swivel chair is immovably installed due to its weight and bottom friction.

The X-axis-Y-axis movable flange 121 is frustoconical in shape, and has a concave portion 122 at its upper portion and a pair of sliding concave portions 123 (only one sliding concave portion in FIG. 1) at its lower portion. Visible) and the movable part 124 is formed. In addition, the X-axis table 131 has a movable portion 132 at a lower portion and a sliding concave portion 13 that slides along the X-axis direction rail 117.
7, the Y-axis direction rail 133 on the upper part, and the bearing 1
34, 135 and a Y-axis direction adjusting motor 136 are attached. Further, a main motor 141 is fitted in the recess 122 of the X-axis / Y-axis movable flange 121. The main motor 141 is a direct drive type in which the rotor of the motor itself rotates, and a flange 142 and a cable hollow 143 for passing the power supply and control wiring are formed in the rotor. Further, the main motor 141 is a flat servo motor, and the rotation speed detector in the rotating portion detects the rotation speed. Based on this rotation speed, a control circuit (not shown) causes the main motor 1 to move.
The rotation speed of 41 is kept constant.

The threaded rotary shaft 120 connected to the rotary shaft of the X-axis direction adjusting motor 114 is supported by bearings 115 and 116 and is formed under the X-axis table 131. The ball screw / nut type movable part 132 is rotatably fitted. Therefore, the rotary shaft 120 connected to the X-axis direction adjusting motor 114 is rotated at a predetermined number of rotations by the speed reducer, whereby the movable portion 132 moves in the X-axis direction. At this time, an X-axis table 131, which will be described later, slidably moves on an X-axis direction rail 117 provided on the swivel chair grounding base 111. Further, the X-axis direction rail 117 is slidably fitted into a sliding recess 137 (there are a pair, but not visible in FIG. 1) provided in the lower portion of the X-axis table 131, and the X-axis direction rail 117 is slidable. The movement in the direction is performed smoothly and accurately.

The threaded rotary shaft 130 connected to the rotary shaft of the Y-axis direction adjusting motor 136 is supported by bearings 134 and 135, and also has an X-axis.
A ball screw / nut type movable portion 124 formed under the Y-axis movable flange 121 is rotatably fitted. Therefore, the rotary shaft 130 connected to the Y-axis direction adjusting motor 136 is rotated at a predetermined rotation speed by the speed reducer, so that the movable portion 124 moves in the Y-axis direction. At this time, the X-axis / Y-axis movable flange 121 is provided on the X-axis table 131 and slidably moves on the Y-axis direction rail 133. The Y-axis direction rail 133 is slidably fitted in a sliding recess 123 provided in the lower portion of the X-axis-Y-axis movable flange 121, and smoothly and accurately moves in the Y-axis direction. It is a thing.

The X-axis and Y-axis movable flange 121 mounted on the grounding base 111 for a swivel chair having the above-described structure.
Can be finely adjusted in the X-axis and Y-axis directions by pressing a foot switch or the like (not shown) of the X-axis direction adjusting motor 114 or the Y-axis direction adjusting motor 136. By these adjustments, the center of rotation of the main motor 141 provided in the recess 122 of the X-axis and Y-axis movable flange 121 in the horizontal plane coincides with the center of rotation of the electron beam linear acceleration irradiation device.

Next, the adjusting section 200 will be described with reference to FIG. In FIG. 2, a swivel chair base 211
A frusto-conical recess into which the rotary drive unit 100 is inserted is formed on the front side of the container, and a protective cover 212 having a substantially frusto-conical shape is attached, leaving a portion on which the patient's leg is placed. In addition, the swivel chair base 211 includes a pair of Z-axis direction adjusting motors 213 and a Z-axis direction rail 214.
214 'is attached. The rotary shaft 216 of the Z-axis direction adjusting motor 213 is rotated by the bearing 215 attached to the protective cover 212.

The swivel chair table 221 has a sliding recess 222 that slides on the Z-axis direction rails 214 and 214 '.
For example, as shown in the drawing, a bearing 223 provided on the side portion,
224, the X-axis direction adjusting motor 225, and the rotating shaft 22 connected to the rotating shafts of the X-axis direction adjusting motor 225.
6 and a pair of X-axis direction rails 227 (one of which is visible in FIG. 2) provided on the upper part of the swivel chair table 221.

The X-axis direction table 231 is rotatably fitted to the rotary shaft 226 provided in the lower part, for example, a movable part 232 composed of a ball screw and a nut, and the Y-axis direction rail provided in the upper part. 233, 234, a Y-axis direction adjusting motor 235, and a threaded rotating shaft 237 connected to the bearing 236 and the rotating shafts of the Y-axis direction adjusting motor 235.

The Y-axis direction table 241 is slidably mounted on the Y-axis direction rails 233 and 234, and is rotatably fitted therein.
A movable portion 242 including a nut and a cutout portion 243 are provided. Then, in the cutout portion 243, a vertically movable auxiliary lift 244 including, for example, a gas spring 245 and the like is attached. A chair seat plate 251 is attached to the Y-axis direction table 241. A seat 252, an elbow pad 253, and a foot-up cushion 254 are attached to the chair seat plate 251. Further, a backrest 26 is provided at the rear of the chair seat plate 251.
1 is attached so that it can move up and down. The backrest 261 includes a backrest 262 with front and rear and tilting mechanisms,
Shoulder guard 263 and sitting height adjusting motor 264
A bearing 265, a rotary shaft 266 connected to the seat height adjusting motor 264, and a Z-axis direction sliding portion 267, Y.
Axial stop nut 268, brain stereotaxic ring adjuster 26
9 and 9 are attached. Also, a brain stereotaxic fixation ring 271 is attached to the brain stereotaxic fixation ring adjustment unit 269.

The flange 142 of the main motor 141 mounted in the recess 122 of the grounding base 111 for the swivel chair shown in FIG. 1 and the base 21 for the swivel chair of the adjusting part 200.
1 and are connected. The X-axis direction adjustment motor 225 attached to the swivel chair table 221 is rotated for a predetermined time by pressing a foot switch or the like (not shown), so that the X-axis direction table 231 integrated with the movable portion 232 is formed. Is the X-axis direction rail 227.
Slide on the X axis. Similarly, by rotating the Y-axis direction adjusting motor 235 for a predetermined time, the Y-axis direction table 241 integrated with the movable portion 242 is
It slides in the Y-axis direction on the Y-axis direction rails 233 and 234. Further, the Z-axis direction adjusting motor 213 attached to the swivel chair base 211 is rotated for a predetermined time by pressing a foot switch or the like (not shown), so that the swivel chair table 221 becomes a pair of Z-axis direction rails. It moves up and down along 214, 214 '.

The backrest 261 has a seat height adjusting motor 264 according to the seat height of the patient after the patient sits on the seat 252.
To rotate. The front and rear and backrest 262 with the tilt mechanism are fitted to the back of the patient. Since the positional relationship between the stereotaxic fixation ring 271 and the affected part of the patient is determined in advance by CT scan or the like, the center of the affected part of the stereotaxic fixation ring 271 should be substantially the center of rotation of the adjustment unit 200.
The X-axis direction adjustment motor 225, the Y-axis direction adjustment motor 235, the Z-axis direction adjustment motor 213, Z of the adjustment unit 200.
The axial sliding section 267, the Y-axis direction lock nut 268, the brain stereotaxic ring adjusting section 269, etc. are adjusted.

Next, the sitting position irradiation surgical treatment system will be described. First, the swivel chair 300 is transported to the lower part of the electron beam linear acceleration irradiation device. At this time, the rotation driving unit 100
The floating transfer casters 113 are protruded downward to facilitate the movement of the swivel chair 300. Swivel chair 30
After 0 moves to a predetermined position, the floating caster 113 moves to the opening 112 of the grounding base 111 for the swivel chair.
Once housed within, swivel chair 300 is fixed in that position. Next, in order to match the center of rotation of the electron beam linear acceleration irradiation device in the vertical plane with the center of rotation of the swivel chair 300 in the horizontal plane, the X-axis direction adjusting motor 114 and the Y-axis of the rotary drive unit 100 are aligned. The center of rotation of the swivel chair 300 is moved by rotating the direction adjusting motor 136 with a foot switch (not shown) for a desired time. On the other hand, the brain stereotaxic ring 271 is fixed to the skull of the patient by a pin (not shown), and the positional relationship between the brain stereotaxic ring 271 and the center of the affected area is determined by CT scan or the like. After the positional relationship between the brain stereotaxic ring 271 and the center of the affected area is determined, the pseudo stereotaxic ring is attached to the swivel chair 300, and as described above,
Adjustment is performed so that the center of rotation of the swivel chair 300 in the horizontal plane and the center of rotation of the electron beam linear acceleration irradiation apparatus in the vertical plane substantially coincide with each other. Then, the patient with the stereotaxic ring 271 sits on the swivel chair 300. At this time, the center of the affected part may not coincide with the center of the swivel chair 300. In such a case, if the center of the affected part is forcibly moved to the center of the swivel chair 300, the patient will be treated for a long time in an unnatural posture. In order to move the patient to the center of rotation of the swivel chair 300 in a comfortable posture, the X-axis direction adjustment motor 225, the Y-axis direction adjustment motor 235, and Z of the adjustment unit 200 are arranged.
The axial direction adjusting motor 213 is rotated by pressing a foot switch (not shown) or the like. In this way, the center of rotation of the swivel chair 300 and the center of the affected part of the patient coincide with each other in the horizontal plane, and also coincide with the center of rotation of the electron beam linear acceleration irradiation device within the vertical plane.

As shown in FIG. 4, the irradiation angle of the electron beam linear acceleration irradiation device 43 is 0 in front of the horizontal plane of the affected area 45.
In degrees, for example, it starts from -45 degrees and rotates to the rearward 225 degree position shown in FIG. This rotation angle can be further widened to a total angle of about 300 degrees. However, since the swivel chair 42 rotates at a constant angular velocity, it does not need to rotate to the rear side shown in FIG. 4, and it is the same even if it starts from −45 degrees and ends at 90 degrees. At this time, the peripheral speed of the swivel chair 42 is fast in the vicinity of 0 degree shown in FIG. 4 which is farthest from the vertical axis passing through the center position of the affected area 45, and is the slowest just above the axis. Therefore, in order to irradiate the same amount of the radiation beam 44 at the central position of the affected part 45 per unit time, the rotation speed of the electron beam linear acceleration irradiation device 43 is farthest from the vertical axis passing through the central position of the affected part 45. 0 shown in
It needs to be slow near degrees and fast just above the axis.
Then, it is preferable to control the rotation speed of the electron beam linear acceleration irradiation device 43 based on a trigonometric function. This speed control can be performed using a computer, but
Since the speed is such that it travels between 5 degrees over 30 to 40 minutes, it is possible to divide this section into, for example, 6 equal parts and gradually change the speed little by little. By controlling the rotation speed of the electron beam linear acceleration irradiation device 43 in this manner, the amount of the radiation beam 44 irradiated to the center of the affected area 45 becomes constant. Further, the electron beam linear acceleration irradiation device 43 can be rotated so as to perform a reciprocating motion in which the amplitude of the rotation is gradually increased about 0 degree shown in FIG. In this case, the number of irradiations of the electron beam linear acceleration irradiation device 43 is large near 0 degrees, and the number of irradiations is small near 90 degrees shown in FIG. In this way, the radiation dose to the affected area is adjusted, but the speed of the electron beam linear acceleration irradiation device 43 can be controlled by calculating the dose distribution to the head.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. And
Various design changes can be made without departing from the invention as set forth in the claims. For example, it goes without saying that the shape of the L-shaped arm or the structure of the caster may include a modified one as long as the same operation is performed. Further, it goes without saying that the frustoconical shape that is the shape of the swivel chair is not necessarily limited to the geometrical frustoconical shape and may include a modified shape. Further, the linear drive mechanism may be replaced by any one other than those described in the embodiment as long as it has an equivalent function.

[0030]

According to the present invention, the moving device for a swivel chair in the sitting position irradiation surgical treatment system can be easily moved and fixed by the floating-type moving caster having a simple structure. According to the present invention, since the floating transfer caster is housed inside the frusto-conical swivel chair, the swivel chair is small in size and has a good appearance despite having the moving device. .. Also, since the sliding mechanism and the floating casters were housed in the frustoconical part, and the bottom end of the swivel chair had the largest diameter, this part served as a guard, Protect the top.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a rotation drive unit that is a lower portion of a swivel chair.

FIG. 2 is a diagram for explaining an adjusting unit that is an upper part of a swivel chair.

FIG. 3 is a diagram for explaining the outer appearance of a swivel chair in which an adjustment unit is placed on a rotation drive unit.

FIG. 4 is an explanatory diagram of a state in which sitting position treatment is performed by irradiating a diseased part of a patient with radiation using an electron beam linear acceleration irradiation device.

5 (a) and 5 (b) are a top view and a side view for explaining a dedicated moving carriage for moving a rotary chair for a sitting irradiation surgical treatment system.

[Explanation of symbols]

100 ... Rotational drive unit 222 ...
・ Sliding recess 200 ・ ・ ・ Adjusting part 223 ・ ・
・ Bearing 300 ・ ・ ・ Swivel chair 224 ・ ・
・ Bearing 111 ・ ・ ・ Grounding base for swivel chair 225 ・ ・ ・ Motor for adjusting X-axis direction 112 ・ ・ ・ Opening device 113 ・ ・ ・ Caster for floating movement 226 ・ ・
・ Rotary shaft 114 ・ ・ ・ X-axis direction adjustment motor 227 ・ ・
・ X-axis direction rail 115 ・ ・ ・ Bearing 231 ・ ・
・ X-axis direction table 116 ・ ・ ・ Bearing 232 ・ ・
・ Movable part 117 ・ ・ ・ X-axis direction rail 233 ・ ・
・ Y-axis direction rail 118 ・ ・ ・ Movable cylinder 234 ・ ・
・ Y-axis direction rail 119 ・ ・ ・ Roller 235 ・ ・ ・ Y-axis direction adjusting motor 120 ・ ・ ・ Rotating shaft 121 ・ ・ ・ X-axis-Y-axis movable flange 236 ・ ・
・ Bearing 122 ・ ・ ・ Recessed portion 237 ・ ・
・ Rotary shaft 123 ・ ・ ・ Sliding recess 241 ・ ・
・ Y-axis direction table 124 ・ ・ ・ Movable part 242 ・ ・
・ Movable part 130 ・ ・ ・ Rotary shaft 243 ・ ・
・ Notch 131 ・ ・ ・ X-axis table 244 ・
・ Auxiliary lift 132 ・ ・ ・ Movable part 245 ・
・ Gas spring 133 ・ ・ ・ Y-axis direction rail 251 ・ ・
・ Chair seat plate 134 ・ ・ ・ Bearing 252 ・ ・
・ Seat 135 ・ ・ ・ Bearing 253 ・ ・
・ Elbow pad 136 ・ ・ ・ Y-axis direction adjusting motor 254 ・ ・ ・ Foot up clip 137 ・ ・ ・ Sliding recession section 141 ・ ・ ・ Main motor 261 ・ ・
・ Backrest 142 ・ ・ ・ Flange 262 ・ ・ ・ Front and back and tilt 143 ・ ・ ・ Cable hollow backrest with mechanism 151 ・ ・ ・ L-shaped arm 263 ・ ・
・ Shoulder guards 152, 153 ... Support point 264 ...
・ Seat height adjusting motor 154 ・ ・ ・ Piston 265 ・ ・
・ Bearing 211 ・ ・ ・ Rotating chair base 266 ・ ・
・ Rotary shaft 212 ・ ・ ・ Protective cover 267 ・ ・
・ Z-axis direction sliding part 213 ・ ・ ・ Z-axis direction adjusting motor 268 ・ ・ ・ Y-axis direction locking nut 269 ・ ・ ・ Brain localization fixation ring adjustment 214 ・ ・ ・ Z-axis direction rail adjusting part 215 ・ ・ ・Bearing 271 ...
・ Brain stereotaxic ring 216 ・ ・ ・ Rotating shaft 221 ・ ・ ・ Rotating chair table

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display area A61N 5/10 F 8119-4C

Claims (3)

[Claims] 1. An electron beam linear acceleration irradiation device that irradiates radiation while rotating in a vertical plane centered on the affected area, and a rotating chair that rotates in a horizontal plane about a vertical axis passing through the center of the affected area. In the sitting irradiation surgical treatment system, the first and second movable units can move in the X-axis direction and the Y-axis direction in order to adjust the rotation center of the electron beam linear acceleration irradiation device to match the rotation center of the rotating chair. The second sliding mechanism and the third to fifth sliding mechanisms capable of moving in the X-axis direction, the Y-axis direction, and the Z-axis direction in order to match the rotation center of the electron beam linear acceleration irradiation device with the center of the affected area. A rotary chair moving device in a sitting position irradiation surgical treatment system comprising a rotary chair having: a rotary chair grounding bed having a plurality of openings to which the first and second sliding mechanisms are attached. And a floating-type moving caster attached so as to be retractable from the opening, a moving device for a swivel chair in a sitting irradiation surgical treatment system. 2. A levitating transfer caster mounted on the rotating chair grounding base has an L-shaped arm pivotally supported at one end on the rotating chair grounding base, and one end of the L-shaped arm. A linear drive mechanism in which the other end of the L-shaped arm is rotatably supported on the grounding base for the swivel chair, and the other end of the L-shaped arm is attached to the lower end of the L-shaped arm. The moving device for a swivel chair in the sitting irradiation surgical treatment system according to claim 1, further comprising a caster capable of projecting and retracting through the opening. 3. The floating caster mounted on the grounding base for the swivel chair is mounted so as to be able to appear in and out of the lower part of the frusto-conical swivel chair. 1. A moving device for a swivel chair in the sitting irradiation surgical treatment system of 1.